Abstract
GexSe50Te50-x (x = 5, 15, 20, 35 at.%) bulk glasses were synthesized by the melt quenching method. The amorphous nature of the investigated glasses was determined by X-ray diffraction. Results of differential scanning calorimetry (DSC) of the studied compositions under non-isothermal conditions were reported and discussed. The glass transition temperature (T-g), onset crystallization temperature (T-c), and crystallization peak temperature (T-p) were determined from DSC traces at different heating rates. It was found that the values of T-g, T-c, and T-p rely on both composition and heating rate. A double crystallization stages were observed in the DSC results. Various kinetics parameters such as the glass transition energy (E-g), crystallization activation energy (E-c), and rate constant (K-p) were calculated. The glass-forming ability of the studied compositions was discussed as function of the determined kinetics parameters.